20220802
16201700
1.0
FGDC CSDGM Metadata
FALSE
landslide_compilation
608063.000000
2534531.000000
88562.000000
1347674.625000
1
002
Projected
GCS_North_American_1983_HARN
Linear Unit: Foot_US (0.304801)
NAD_1983_HARN_StatePlane_Washington_South_FIPS_4602_Feet
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.6'><WKT>PROJCS["NAD_1983_HARN_StatePlane_Washington_South_FIPS_4602_Feet",GEOGCS["GCS_North_American_1983_HARN",DATUM["D_North_American_1983_HARN",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1640416.666666667],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-120.5],PARAMETER["Standard_Parallel_1",45.83333333333334],PARAMETER["Standard_Parallel_2",47.33333333333334],PARAMETER["Latitude_Of_Origin",45.33333333333334],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",2927]]</WKT><XOrigin>-117498300</XOrigin><YOrigin>-98850300</YOrigin><XYScale>1000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.002</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>2927</WKID><LatestWKID>2927</LatestWKID></ProjectedCoordinateSystem>
20220618
09584500
20220726
14501700
FGDC
150000000
5000
Washington Geological Survey
360-902-1450
360-902-1785
MS 47007
Olympia
WA
98504
geology@dnr.wa.gov
20220726
ArcGIS Metadata
1.0
Washington Geological Survey
360-902-1450
360-902-1785
MS 47007
Olympia
WA
98504
geology@dnr.wa.gov
File Geodatabase Feature Class
Landslide Compilation
Washington Geological Survey
Washington Geological Survey
MS 47007, Olympia, WA, 98504
vector digital data
Washington Geological Survey, 2022, Washington State Landslide Inventory Database--GIS data, July 2022: Washington Geological Survey Digital Data Series 29, version 1.0.
https://fortress.wa.gov/dnr/geologydata/publications/data_download/ger_portal_landslide_database.zip
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This feature class contains landslides compiled from a variety of sources, spanning the past few decades. The Landslide Compilation contains landslides from the following sources: (1) Landslides that are mapped within 1:24,000-scale geologic mapping (not statewide) and our statewide 1:100,000-scale geologic map compilation; (2) a miscellaneous compilation of pre-existing landslide data from several sources, including the Washington Geological Survey, the Department of Natural Resources’ Forest Practices Division, and other federal and private entities; (3) landslides mapped as part of Watershed Analysis efforts for the Forest Practices Board; (4) reconnaissance-scale mapping of landslides associated with significant landslide events; and (5) a study of near-shore landforms along the Salish Sea.</SPAN></P><P><SPAN>1:24,000-scale and 1:100,000-scale Landslides from Geologic Mappings how landslides that were extracted from 1:24,000- and 1:100,000-scale geologic maps. Landslide mapping was not the primary purpose of these projects, and the absence of a mapped landslide in a particular location does not suggest that no landslide exists or that there is no landslide risk. Also, due to the scale of the final mapping products, landslides with deposits too small to be identified in any included scale of geologic mapping (for example, debris flows, debris avalanches, rock topples, etc.) are not typically included. Only partial coverage exists for landslides mapped at 1:24,000 scale. 1:100,000-scale mapping covers the entire state.</SPAN></P><P><SPAN>Miscellaneous Landslide Mapping is compiled landslide data from many sources focused on landslide mapping. Each project has its own protocol and methods, so it is up to the user to determine how best to interpret the landslide data. To avoid the risk of misinterpretation, invalid results, and erroneous conclusions, users should consider original map scale, collection methodology, original mapping purpose, currency of data, and any other conditions specific to every data element and each dataset as a whole.</SPAN></P><P><SPAN>Watershed Analysis Landslide Mapping polygons were created to support forest practices rules in identification of unstable slopes in various watersheds throughout the state. Rule-identified landform mapping was conducted using aerial photographs, maps (including geology, soil, and topographic), field observations, and limited lidar. Landforms were identified and mapped using a Watershed Analysis or the Landslide Hazard Zonation Protocol. All rule-identified landforms are not shown; only areas identified as landslides in the original watershed analyses are included in this data.</SPAN></P><P><SPAN>Reconnaissance-Scale Landslide Mapping is compiled landslides mapped from surveys immediately following widespread rain or rain-on-snow events in Washington. Mapping techniques for these large-scale surveys vary between aerial surveys from small aircraft, aerial photography, or lidar identification, with minimal field verification.</SPAN></P><P><SPAN>The Salish Sea Landforms identifies landforms along 2,200 miles of Salish Sea shoreline that have characteristics of deep-seated landslides, but lack the thorough investigation necessary to classify these landforms as landslides. All landforms in this layer were identified using historic aerial imagery and 3- to 6-foot LiDAR digital elevation models (DEM). Based on interpretation of LiDAR derivatives (such as hill shades, contour lines, and slope gradient) and aerial imagery, observations of geomorphic features representative of a deep-seated landslide were delineated in a GIS. Due to the method of data collection and the certainty of the data, this dataset should not be confused with a landslide inventory, which typically undergoes a thorough, historic aerial imagery analysis, field validation, and peer review. </SPAN></P><P><SPAN>Landslides from various projects may or may not have used lidar for landslide identification. Landslides in this compilation are mapped at various scales and with varied purpose. Many of these compilation layers are not statewide in extent – the absence of a mapped landslide in a particular location does not suggest that no landslide exists or that there is no landslide risk.</SPAN></P><P><SPAN>To avoid the risk of misinterpretation, invalid results, and erroneous conclusions, users must consider original map scale, collection methodology, currency of data, and any other conditions specific to every data element and each dataset as a whole. This dataset is not intended as a substitute for a detailed investigation of potential slope instability by a qualified practitioner. Site-specific analysis may give results that differ from those displayed on the map.</SPAN></P><P><SPAN>In areas where the Landslide Compilation is overlapped by the lidar-based Landslide Inventory, the overlapping zones have been attributed as ‘superseded.’ These layers are not displayed on the portal but are available in the GIS download of the Landslide Compilation.</SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
These data were produced to provide attribute and spatial information on landslides in Washington State. This data is non-regulatory and is intended for informational purposes. It may not be suitable for legal, engineering, forestry, or surveying purposes; but it is intended to assist planners, homeowners, regulators, and others by identifying areas to seek further geologic investigation in before developing, or areas to avoid. Users of this information should consider their intended application, and review or consult the accompanying documentation, to determine the usability of the data for themselves.
Washington Geological Survey
360-902-1450
360-902-1785
MS 47007
Olympia
WA
98504
geology@dnr.wa.gov
USGS Geographic Names Information System (GNIS) http://geonames.usgs.gov/
USA
Washington State
Jackson, Julia A. (ed.), Mehl, James P., Jr. (ed.), Neuendorf, Klaus K. E. (ed.), 2005, Glossary of Geology; 5th ed.: American Geological Institute, 779 p.
debris avalanche
slumps
mass wasting
soil creep
block slides
geologic hazards
shallow landslide
rock falls
lateral spreading
slides
deep seated landslide
landslides
debris avalanche
USA
slumps
mass wasting
soil creep
block slides
geologic hazards
shallow landslide
rock falls
lateral spreading
slides
deep seated landslide
landslides
Washington State
This digital data and metadata, (hereinafter collectively referred to as the "information"), are provided on an "AS IS", "AS AVAILABLE" and "WITH ALL FAULTS" basis. Neither Department of Natural Resources nor any of its officials and employees makes any warranty of any kind for this information, express or implied, including but not limited to any warranties of merchantability or fitness for a particular purpose, nor shall the distribution of this information constitute any warranty. The information is collected from various sources and will change over time without notice. DNR and its officials and employees assume no responsibility or legal liability for the accuracy, completeness, reliability, timeliness, or usefulness of any of the information provided nor do they represent that the use of any of the information will not infringe privately owned rights. The information is not intended to constitute advice nor is it to be used as a substitute for specific advice from a licensed professional. You should not act (or refrain from acting) based upon the information without independently verifying the information and, as necessary, obtaining professional advice regarding your particular facts and circumstances. References to any specific commercial product, process, and service by trade name, trademark, or manufacturer do not constitute or imply endorsement, recommendation, or favoring by DNR and its officials and employees. In no event will DNR be liable to you or any third party for any damages arising out of the use of or inability to use the digital data, even if DNR is advised of the possibility of such damages.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Washington Geological Survey (WGS) shall not be held liable for improper or incorrect use of the data described and/or contained herein. This product is provided 'as is' without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular use. The Washington State Department of Natural Resources and the authors of this product will not be liable to the user of this product for any activity involving the product with respect to the following: (a) lost profits, lost savings, or any other consequential damages; (b) the fitness of the product for a particular purpose; or (c) use of the product or results obtained from use of the product. Although these data have been processed successfully on computers of WGS, no warranty, expressed or implied, is made by WGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.</SPAN></P></DIV></DIV></DIV>
Version 6.2 (Build 9200) ; Esri ArcGIS 10.5.1
-124.668111
-116.967191
45.587549
49.02765
0.000000
0.000000
Publication date
2018-08-01
0.000000
0.000000
1
-124.794860
-116.779333
49.027650
45.503893
0.000000
0.000000
The Washington Geological Survey (WGS) shall not be held liable for improper or incorrect use of the data described and/or contained herein. This product is provided 'as is' without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular use. The Washington State Department of Natural Resources and the authors of this product will not be liable to the user of this product for any activity involving the product with respect to the following: (a) lost profits, lost savings, or any other consequential damages; (b) the fitness of the product for a particular purpose; or (c) use of the product or results obtained from use of the product. Although these data have been processed successfully on computers of WGS, no warranty, expressed or implied, is made by WGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
Each source database was checked for attribute completeness and correct spatial reference before inclusion in this compilation. Some of the source databases do not contain all of the attributes of this compilation, these attributes were left blank as appropriate.
Each source database in this compilation studied a specific area or areas within Washington State. As a result this compilation covers the cumulative areas of these studies, not the entire state. Please refer to the extent footprints layer in this geodatabase to see where landslide studies have, or have not, been conducted.
Attribute accuracy varies considerably between source databases. This is a result of the different business needs for which the various databases were made, the scale of the mapping, and the resolution and type of base map or aerial photography used to locate the landslides. Please refer to the Data Confidence field for additional information about a particular source database or particular features.
Horizontal accuracy varies considerably between source databases. This is a result of the different business needs for which the various databases were made, the scale of the mapping, and the resolution and type of base map or aerial photography used to locate the landslides. Please refer to the Location Confidence field for additional information about a particular source database or particular features.
Version 1 (July 2022): Converted previous landslide inventory and landslide compilation databases into this new and comprehensive dataset.
As relevant landslide databases are identified/created we merge features from that database into our landslide compilation database. The spatial reference will be changed (if needed) to match the WGS standard projection (WA stateplane south zone, HARN). Fields in the compilation database are calculated from corresponding fields in the new database. Reference fields in the compilation database are then calculated from information about the new database. Landslide Hazard Zonation Data: Landslide processes were modified from the Washington State Department of Natural Resources, Forest Practices Division, Landslide Hazard Zonation Project Protocol. The changes reflect gaps in the LHZ protocol, such as the additions of hyperconcentrated flows and lateral spreads, which are critical in future land-use planning. Landslide processes were grouped into two categories, shallow landslides and deep-seated landslides. Shallow landslides are differentiated to shallow undifferentiated (including shallow colluvial), debris flow, debris slide (which includes debris avalanches), hyperconcentrated flows, block falls and topples. Deep-seated landslides are differentiated to lateral spreads, general deep-seated, earthflows, translational, rotational, composite and megalandslides/sturzstroms. Landslide attributes were modified from the Washington Department of Natural Resources, Forest Practices Division, Landslide Hazard Zonation Project Protocol. Attributes were created for multiple reasons. The first was to establish a balance between critical information and excessive attribution. The second was to ensure critical information would be available for land-use planning and hazard assessment, as well as for future research into landslide hazards. The third was to establish a basis by which to flag landslides that have caused or potentially could cause damage. Emphasis was placed on landslide triggers, such as slope, gradient, and structure. Version History Version 5.1 (August, 2018) Areas that have been superseded by the landslide inventory mapping protocol have been removed from this feature class. A separate feature class containing the superseded data has been added to the geodatabase. Fixed attribution in the Landslide_ID and SOURCE_DB_FEATURE_ID fields.
2018-08-01T00:00:00
67127
landslide_compilation
This feature class contains landslide polygons and descriptive data.
Washington Geological Survey
Feature Class
67127
LANDSLIDE_DATE
Year/month/day of landslide failure
Washington Geological Survey
Dates that are specific to each feature.
Landslide Date
Date
8
0
0
GEOLOGIC_UNIT_LABEL
Geologic unit of landslide origin.
Washington Geological Survey
textual descriptions
Geologic Unit Label
String
15
0
0
GRADIENT_METHOD
How the landslide gradient was determined.
Washington Geological Survey
textual description
Gradient Method
String
50
0
0
LANDSLIDE_NAME
Name given to the landslide.
Washington Geological Survey
textual descriptions
Landslide Name
String
50
0
0
GRADIENT_DEGREES
Numerical cardinal degrees (9999 is unknown.)
Washington Geological Survey
value field
Gradient (degrees)
SmallInteger
2
0
0
STRUCTURE_ASSOCIATION
Description of the structure of the landslide
Washington Geological Survey
textual description
Structure Association
String
20
0
0
DSLS_MORPHOLOGY
Textual description deep-seated landslide morphology
Washington Geological Survey
textual descriptions
DSLS Morphology
String
30
0
0
SLOPE_MORPHOLOGY
Description of the slope morphology
Washington Geological Survey
textual description
Slope Morphology
String
20
0
0
LANDSLIDE_TRIGGER_EVENT
Description of the kind of regional event that has caused the landslide.
Washington Geological Survey
textual descriptions
Landslide Trigger Event
String
50
0
0
FIELD_CHECK
Description of whether the landslide has been field-checked by a landslide professional.
Washington Geological Survey
textual descriptions
Field Check
String
50
0
0
DATA_CONFIDENCE
The level of confidence WGS geologists have in the source data.
Washington Geological Survey
High
Field mapping complimented with high-resolution remote data such as lidar and (or) >1 ft resolution aerial imagery; adjacent landslides may not have been identified or mapped
Washington Geological Survey
Moderate
Medium-scale field mapping; may exclude some landslides due to size or landslide type; remote assessment using several different sources from different scales; most data collected by remote review; captures a subset of landslide in the area
Washington Geological Survey
Low
Reconnaissance landslide mapping; significant landslide population may be excluded or missing
Washington Geological Survey
Low-Moderate
Small-scale field mapping; may exclude some landslides due to size or landslide type; captures a subset of landslides in the area
Washington Geological Survey
Moderate-High
Systematic landslide mapping following a documented methodology; most landslide information collected by remote interpretation using several sources at various scales; interpretation primarily by remote assessment; captures a subset of landslides in the area
Washington Geological Survey
Data Confidence
String
20
0
0
Shape
Feature geometry
ESRI
Feature geometry
20070817
20080708
SHAPE
Geometry
0
0
0
LANDSLIDE_LIMIT_DATE
Approximate date of when landslide was first identified --9999 is unknown.
Washington Geological Survey
Dates that are specific to each feature.
Landslide Limit Date
Date
8
0
0
LANDSLIDE_CERTAINTY
Likelihood of the existence of the landslide.
Washington Geological Survey
textual descriptions
Landslide Certainty
String
15
0
0
OBJECTID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
OBJECTID
OID
4
0
0
ASPECT
Aspect of landslide.
Washington Geological Survey
value field
20070817
20080708
Aspect
SmallInteger
2
0
0
LAND_USE
Description of the land use where the landslide occurred.
Washington Geological Survey
textual descriptions
Land Use
String
30
0
0
COMMENTS
General comments related to the landslide.
Washington Geological Survey
textual descriptions
20070817
20080708
Comments
String
255
0
0
FEATURE_SOURCE
Name of the source database from which the landslide feature was obtained.
Washington Geological Survey
textual descriptions
Feature Source
String
60
0
0
LANDSLIDE_ID
Unique identifier assigned to each feature.
Washington Geological Survey
textual descriptions
Landslide ID
Integer
4
0
0
LOCATION_CONFIDENCE
The level of confidence WGS geologists have in the feature location.
Washington Geological Survey
Low
Reconnaissance landslide mapping; landslide perimeter and location may be mislocated exceeding several hundred feet and on occasion thousands of feet
Washington Geological Survey
Moderate
Medium-scale field mapping may mislocate landslide perimeter or location in excess of hundreds of feet; remote mapping may include moderate-to-high resolution imagery or elevation models for landslide interpretation and follow systematic mapping protocol
Washington Geological Survey
Moderate_high
Large-scale field mapping may mislocate landslide perimeter or location as much as one hundred feet
Washington Geological Survey
High
Landslide locations at the time of mapping is accurate and was likely located in the field using GPS and high-resolution remote data such as lidar and (or) >1 ft resolution aerial imagery
Washington Geological Survey
Low-Moderate
Small-scale field mapping may mislocate landslide perimeter or location as much as several hundred feet; remote mapping may include low-quality imagery or elevation models for landslide interpretation
Washington Geological Survey
Location Confidence
String
20
0
0
Shape_Length
Length of feature in internal units.
ESRI
Positive real numbers that are automatically generated.
SHAPE_Length
Double
8
0
0
LANDSLIDE_TYPE
Description of landslide types.
Washington Geological Survey
textual descriptions
Dates that are specific to each feature.
Landslide Type
String
100
0
0
SOURCE_INFORMATION
Source Information
String
700
0
0
SOURCE_DB_FEATURE_ID
Landslide ID used in source database
Washington Geological Survey
value field
Source DB Feature ID
Integer
4
0
0
SOURCE_URL
Source URL
String
255
0
0
DISPLAY_ON_PORTAL
Display on Portal
String
5
0
0
CHANGE_TYPE
Change Type
String
10
0
0
CHANGE_DATE
Change Date
Date
8
0
0
CHANGE_DESCRIPTION
Change Description
String
255
0
0
INFRASTRUCTURE_DAMAGE
Description of infrastructure damage caused by the landslide.
Washington Geological Survey
textual descriptions
Infrastructure Damage
String
90
0
0
Shape_Area
Area of feature in internal units squared.
ESRI
Positive real numbers that are automatically generated.
SHAPE_Area
Double
8
0
0
dataset
EPSG
8.9.3(9.0.0)
Simple
FALSE
67127
TRUE
TRUE